#include <stdio.h>

int main() {
    char ch;
    while (scanf_s("%c", &ch) != EOF) {
        getchar();
        if (ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z')
        {
            printf("%c is an alphabet.\n", ch);

        }
        else
            printf("%c is not an alphabet.\n", ch);
    }

    return 0;
}